<template>
	<div class="goods-info">
		<!-- 商品展示图 -->
		<div class="mui-card">
			<div class="mui-card-content">
				<div class="mui-card-content-inner">
					<swiper :imgList="goodsinfo.album"></swiper>
				</div>
			</div>
		</div>
		<!-- 购物车小球动画 -->
		<transition @before-enter="beforeEnter" @enter="enter" @after-enter="afterEnter">
			<div class="ball" v-show="ballFlag" ref="ball"></div>
		</transition>

		<!-- 商品购买区域 -->
		<div class="mui-card">
			<div class="mui-card-header">{{ goodsinfo.name }}</div>
			<div class="mui-card-content">
				<div class="mui-card-content-inner">
					<p class="price">
						定价：<span>¥{{ goodsinfo.price }}</span>
					</p>
					<div v-if="goodsinfo.num">
						<p class="go-num">
							购买数量
							<numbox @count="countChange" :max="goodsinfo.num" initcount="1" :goodsid="goodsinfo.id">
							</numbox>
						</p>

						<p class="go-buy">
							<mt-button type="primary" size="small" @click="buy">立即购买</mt-button>
							<mt-button type="danger" size="small" @click="addShopcart">加入购物车</mt-button>
						</p>
					</div>
					<div v-else>该商品暂时无货</div>
				</div>
			</div>
		</div>
		<!-- 商品参数区域 -->
		<div class="mui-card">
			<div class="mui-card-header">商品参数</div>
			<div class="mui-card-content">
				<div class="mui-card-content-inner">
					<p>商品卖点：{{ goodsinfo.sell_point }}</p>
					<p>库存情况：{{ goodsinfo.num+59}}件</p>
					<p>上架时间：{{ goodsinfo.create_time }}</p>
				</div>
			</div>
			<div class="mui-card-header">商品详情</div>
			<div class="good-desc">
				<div class="content" v-html="goodsinfo.content"></div>
			</div>
		</div>
	</div>
</template>

<script>
	import swiper from '../../components/swiper.vue'
	import numbox from '../../components/numbox.vue'
	export default {
		data() {
			return {
				goodsinfo: {}, // 获取到的商品信息
				selectedCount: 1, // 保存商品数量，默认是1
				ballFlag: false, // 控制小球的显示和隐藏
			}
		},
		props: ['id'],
		created() {
			this.getGoodsInfo()
		},
		methods: {
			getGoodsInfo() {
				this.$indicator.open({
					text: '加载中'
				})
				let params = {
					id: this.id
				}
				this.$http.get('goodsinfo', {
					params: params
				}).then(res => {
					this.$indicator.close()
					if (res.data.code === 0) {
						this.$toast(res.data.msg)
					} else if (res.data.code === 1) {
						if (res.data.data) {
							this.goodsinfo = res.data.data
						} else {
							this.$messagebox.alert('商品不存在').then(() => {
								this.$router.go(-1)
							})
						}
					} else {
						this.$toast('加载失败，服务器异常')
					}

				})
			},
			countChange(goodsinfo) {
				this.selectedCount = goodsinfo.count
			},
			addShopcart() {
				this.ballFlag = !this.ballFlag
				this.$store.commit('shopcart/addCar', {
					id: this.id,
					count: this.selectedCount,
					selected: true
				})
			},
			// 小球动画-进入前
			beforeEnter(el) {
				el.style.transform = 'translate(0,0)'
			},
			// 小球动画-进入
			enter(el, done) {
				el.offsetWidth // 必须加上此行代码，否则没有动画效果
				// 获取小球在页面中的位置
				const ballPosition = this.$refs.ball.getBoundingClientRect();
				// 获取徽标在页面中的位置
				const badgePosition = document.getElementById('badge').getBoundingClientRect()
				const xDist = badgePosition.left - ballPosition.left
				const yDist = badgePosition.top - ballPosition.top
				el.style.transform = `translate(${xDist}px,${yDist}px)`;
				el.style.transition = 'all .5s cubic-bezier(.4, -0.3, 1, .68)'
				done()
			},
			// 小球动画-进入后
			afterEnter() {
				this.ballFlag = !this.ballFlag
			},
			buy() {
				this.$store.commit('shopcart/setBuy', {
					id: this.$props.id,
					count: this.selectedCount
				})
				this.$router.push({
					name: 'order_create'
				})
			}




		},
		components: {
			swiper,
			numbox

		}
	}
</script>
<style lang="scss" scoped>
	.goods-info {
		background: #f1f1ff;
		overflow: hidden;

		.price {
			span {
				color: red;
				font-size: 14px;
				font-weight: bold;
			}
		}

		.go-buy {
			display: flex;
			margin: 10px 0 0px;
			justify-content: center;

			button {
				margin: 0 5px;
			}
		}

		.good-desc {
			background: #fff;
			padding: 5px;

			h3 {
				font-size: 16px;
				color: #226aff;
				text-align: center;
				margin: 15px 0;
			}

			.content {
				font-size: 14px;
				line-height: 28px;

				img {
					width: 100%;
				}
			}
		}

		.go-num {
			div {
				margin-left: 10px;
			}
		}

		.ball {
			width: 15px;
			height: 15px;
			border-radius: 50%;
			position: absolute;
			background: red;
			z-index: 99;
			left: 132px;
			top: 390px;
			transform: translate(93px, 230px)
		}

	}
</style>